Refrigerated display case



May 29,1928.

E. FRIEDRICH REFRIGERATED DISPLAY CASE Filed May 11, 1927 3 Sheets-Sheet 1' w mw m NT W ATTORNEY 9 2 m. 1 r A a d 1 9 R.6 m pm m WM S H s H l 3 MN w NM mm E An m $1 I E E 7 N 8% N m w H M w \w m H 1 NW W R I D m u. g w m m w. w F M M w w R E w \m w \H I F w W w R 9 NR ww 1: our 0 a v 8 i. v 2 /fi 2/ f 7 9 a H 2 T \w v V v M l WW 7 Q N May 29, 1928. 1,671,419

E. FRIEDRICH REFRIGERATED DISPLAY CASE Filed May 11, 1927 3 Sheets-Sheet 3 womb] I INVENTOR ATTORNEY Patented May 29, 1928.

UNITED sures EDWABD FRIEDRICH, OF SAN ANTONIO, TEXAS.

4 BEFRIGERATED DISPLAY CASE.

Application filed may 11,

' My invention relates to that type of display cases which is especially adapted for the keeping and display of fresh meats, etc. and it particularly has for its object to provide a case of this typeof a very efficient na ture, a' case wherein an even temperature can be maintained at all times and'one in which a particularly perfect circulation of alr is maintained between the cooling bunker and the display chamber, thereby keeping all the food contents of the case equally fresh and in good condition.

A further object is to eliminate the necessity of using cooling coils beneath the whole top of the cabinet and to conceal the cooling apparatus that is used so that it shall not be visible to the purchaser.

Again it is an object to so design the circulating ducts, bafiles and cooling bunker with its contained cooling apparatus as to prevent dripping of condensation products onto the material displayed within the food chamber and to render the case fully sanitary.

design and arrange the parts of the case that the external appearance orrdesi thereof will be pleasing tothe'eye and t e case be-' ing an ornament to any store in which 1t may be put.

With other objects in view which will appear to those skilled in the art, the invention further resides in those novel features of construction, combination and arrangement of parts, all of which will be first fu ly described, then be specifically pointed out in the appended claims, reference being had to the accompanyingdrawings in which Figure 1 1s a perspective view looking toward the front of the case;

Figure 2 is a perspective view looking toward the rear of the case.

Figure 3 is avertical longitudinal section on the line 3-3 of Figure 4.

Figure 4 is a cross section on the line 44 of Figure 1.

Figure 5 is'a cross section on the line 55 of Figure 3.

Figure 6 is a vertical longitudinal section of a slight modification of the invention.

(half cabinet). Figure 7 is a detail perspective view of one of the baffles.

In the drawings in which like numerals of reference designate like parts in all thsfigw 7 designates end walls of Another object of the invention is to so' along the front of the .case an 1927. Serial No. 190,566.

ures, 1 represents the bed frame which is composed of longitudinal and transverse beams and which sustains the bottom of the display chamber, the bottom being suitabl v mounted on suitable feet 5 and 6 designates a bottom space which is located" between the bottom of the food chamber and thecentral pair of base supports 4 as best shown in Figures 3, 4 and 5 of the drawings.

which are provided with suitable heat 'insu the cabinet lation 8 and a suitable sheathing or facing9.

10 designates the upper vertical wall-framing and 11 indicates the top horizontal Wall plates which support the end sections 12 of the top of the case. The top of the case is also provided with suitable-heat insulation 13 and a facing or sheathing 14. i

15 designates the front and back wall heat insulating material, the back wall being provided with suitable door openin s 16 and doors 17 (the doors being .provi ed with suitable transparencies 21 if desired, see Figure 5) and 18 designates the front wall glass supporting frames which carry the transparencies 22. The front wall includesfacing strips 19 and the rear wall includes facing strips 20. A shelf 23 ma be secured a shelf 24 along the rear for the usual purposes.

It will be seen that spaced a considerable distance from the ends of the case is an upwardly extended portion consistin of front,

back,and end walls 25, suitably eat insulated as at 27. The upwardly extendin portion has a top '26, also heat insulate with suitable heat insulation 27, and the inner walls of this upper extension, are sheathed as at 28. The n ward extension provides a bunker 48 in which the refrigerating apparatus hereinafter again referred.

to is located.

Spaced inwardly a slight distance from the end of the bunker are vertical heatinsulated cross partition walls 29 which extend from a point within the food display compartment upwardly into the bunker space but terminates short of the top thereof for a purpose presently understood.

'Extending from each cross partition 29 toward the respective ends of the case and partitions 30 do not extend entirely to the ends of the case but are spaced a short dis tance therefrom to provide openings into warm air ducts. These ducts are formed by spacing the partitions 30 from the end top sections of the cabinet as shown. The warm air ducts (numbered 31 in the drawings) are inclined upwardly from their entrant ends (adjacent the ends of the case) to their exit ends (at the bunker) to assist the flow of warm air toward the bunker.

The entrances to the warm air ducts are indicated by the reference numeral 32 and the exits by the reference numeral 33.

Located in substantial alignment with the horizontal partitions 30 and between the Vertical-cross partitions 29,-are two sets of baffle plates 34, one set being directed downwardly and toward one end of the case while the other set is directed downwardly and toward the other end of the case, thereby to cause the downwardly moving cold air to be deflected toward the respective ends of the.

case to displace the warm air into the warm air ducts from which the air is discharged into the bunker above the baflie plates;

Supplemental horizontal bafile plates 35 are provided extending inwardly from the cross partitions 29, the supplemental baffle plates 35 having their free edge projected over the lowermost edge of the adjacent inclined baffle so that any products of condensation will drip onto the adjacent inclined baflle and not fall into the food compartment. The several baflles 34 have valleys 36 along their lower edges pitched toward the rear and designed to discharge their contents into a collection valley 37 mounted on the rear wall and itself'discharginginto a down pipe or drain 38 by which the con densation products are passed out of the case. v

Located in the bunkerabove the baflle plates is the refrigerating apparatus which, in the practical embodiment of my invention, consists ofv the boiler 41, refrigerating coils 39 and fins 40 of a Frigidaire apparatus, the compressor (not shown) for which may be located within the space 6. As this Frigidaire apparatus, per se, constitutes no part of the present invention further and detail description thereof is thought to be unnecessary.

Food sustaining trays o r plates 42 are located within the food compartment on suitable supporting cleats 43 and 44 and preferably inclined downwardly toward the front of the case. p i

45 is a sign holder over a lamp chamber 46 in which an illuminating device 47 (electric bulb) is located, or the illuminating device may be omitted and a glass sign plate iments made with a practical display case made in keeping with the drawings of this application.

It will also be noted that because of the position and directionof inclination of the baffles 34 and by reason of the upwardly inclined under surfaces of the partitions 30, and the upward inclination ofthe ducts 31, a'rapid and complete circulation is maintained within the cabinet at all times. The air chilled by the refrigerating apparatus in the bunker 48 descends through the pars sages between adjacent bafiies 34 and is, by the baffles, directed toward either end of the cabinet, the warm air being pushed toward the ends of the cabinet and passed up through the end opening 32 into the return or warm air duct 31, flowing through that duct to the refrigerating bunker 48 over the refrigerating apparatus therein to be again chilled and returned to the food compartment.

A case built in a twelve foot length in which'were placed from one end of the case to the other at approximately 'equal inter- Vals would; read 28 when the Frigidaire machine would automatically cut off. VVhen the temperature would rise to 36 (which took about one hours time) the machine Would then again start and would run for thirty minutes, bringing the temperature back down to 28 this being a running time of eight hours out of twenty-four. In order to test the circulation four small copper fans were placed at different points along the entrance of the case, also one at each end located high enough to be just at the entrance to the warm air ducts at the extreme ends of the case. These fans it was found would run in opposite directions and at the same rate of speed as those in the center of the case. fans were considerably faster than had been anticipated, due to the fact that in the past it has been almost an impossibility to get a real circulation in refrigerating devices of this general type.

From the foregoing description, taken in connection with the accompanying drawings, it is though the complete construction, operation and advantages of my invention will be clear to those skilled in the art to which it relates.

Of course the cabinet may be made in various sizes and dimensions and modified as indicated in Figure 6 if desired.

What I claim is:

1. In a refrigerated display case, an elongated body enclosing a display chamber, said body having a top provided with an upwardly extended bunker portion, a refrigerating apparatus located wholly within the bunker portion, means beneath the refrigerating apparatus for passing chilled air downwardly and directing same toward an end of the case, and a warm air duct beneath and adjacent the top, the entrance to the duct being located at the aforesaid end of the case and the exit of which duct. being located in the bunker, I

2. In refrigerated display cases, an elonated body having a food containing cham- %er with a'top having an upright extension remotely located from one end of the body and constituting a bunker, a partition ex- I tending from the bunker toward the aforeculation through said one end vand spaced therefrom and from the top to constitute a warm air duct whose entrance is located at the aforesaid one end and whose exit is located in and at one end of the bunker, a refrigerating apparatus in,the bunker, said bunker having an open bottom provided with baflies which are inclined downwardly and in a direction toward the aforesaid one end whereby to deflect descending cold air downwardly and toward the aforesaid one end todisplace the warm air and cause it to pass into said warm air duct thereby maintaining a cirsaid food containing chamber in the bunker.

3. In a refrigerated food display case, an elongated box-like body having a food compartment extending from end to end, the

I walls of which compartment are suitably heat insulated, said body havingan upward extension intermediate its ends which constitutes an elevated bunker, vertical cross partitions within said body adjacent the ends of said bunker, horizontal partitions extending from said vertical partitions longitudinally toward the respective endsof the food compartment and spaced from the top thereof to constitute warm air ducts, the entrances to which are located at the respective ends of said food compartment and the exits of which are located at the end of said bunker adjacent the top thereof, a refrigerating apparatus located within the bunker and over whichapparatus the warm air is delivered by said warm air ducts, said bunker between said vertical cross partitions being open at the bottom to permit the 4. In a refrigerated food display case, an

elongated box-like body having a food compartment extending from end to end, the

.walls of which compartment are suitably heat insulated, said body. having an upward extension intermediate its ends which constitutes an elevated bunker, vertical cross partitions within said body adjacent the ends of'said bunker, horizontal partitions extending from said'v'ertical partitions longitudinally toward the respective ends of the food compartment and spaced from the top thereof to constitute warm air ducts, the entrances to which are located at the respective ends of said food compartment and the exits of which are located at the end of said bunker adjacent the top thereof, a refrigerating, apparatus located within the bunker and over which apparatus the warmair is delivered by said warm air ducts, said bunker between said vertical cross parti-,

tions being open at the bottom to permit the chilled air to gravitate downwardly into the food compartment, two series of inclined baffles located between said vertical cross partitions and beneath said refrigerating apparatus, I one series being inclined toward one end of the case and the other series being inclined toward the other end of the case whereby to deflect the descending chilled air currents downwardly and toward the respective ends of the food compartment to displace the warmer air and cause-it to passvmto the warm air ducts at said ends. v

5. In a refrigerated'food display case, an elongated box-like body having a food compartment extending from end to end, the walls of which compartment are suitably heat insulated, said body having'an upward extension intermediate its ends'which constitutes an elevated bunker, vertical cross partitions within said body adjacent the ends of said bunker, horizontal partitions extendin from said vertical-partitions longitudina ly toward the respect1ve ends of the food compartment and spaced from the top its thereof to constitute-Warm air ducts, the entrances to which are located at the respec-' tive ends of said food com 'aartment and the exits of. which are located at the end of said bunker adjacent the top thereof, a refrigerating apparatus located within the bunker and over which apparatus the warm air'i's delivered by said warm air ducts, said 1 bunker between said vertical cross partitions being open at the bottom to permit the chilled air to gravitate downwardl into'the food compartment, two series o inclined bafilesflocated between said vertical cross partitions and beneath said refrigerating apparatus, one series being mclined toward i partitions within said body adjacent the' one end of the case and the other series being inclined toward the other end of the case whereby to deflect the descending chilled air currents downwardly and toward the respective ends of the food compartment to displace the warmer air and cause it to pass into the warm air ducts at said ends, said horizontal partitions having their under surfaces inclined upwardly from the ends adjacent the bunker toward the ends away from the bunker.

6. In a refrigerated food'display case, an elongated box-like body having a food. compartment extending from end to end, the walls of which compartment are suitably heat insulated, said body having an upward extension intermediate its ends which constitutes an elevatedbunker, vertical cross ends of said bunker, horizontal partitions extending from said vertical partitions longitudinally toward the respective ends of .the food compartment and spaced from the top thereof to constitute warm air ducts, the entrances to which are located at the respective ends of said food compartment and the exits of which are located at the end of said bunker adjacent the top thereof, a refrigerating apparatus located within the bunker and over which apparatus the warm air is delivered by said warm air ducts, said bunker between said vertical cross partitions being open at the bottom to permit the chilled air to gravitate downwardly into the food compartment, two series of inclined baflles located between said vertical cross partitions and beneath said refrigerating apparatus, one series being inclined toward one end of the case and the other series being inclined toward the other :endof the 'case whereby to deflect the descending chilled air currents downwardly and toward the respective ends of the food compartment to displace the warmer air and cause it to pass into the warm air ducts at said ends, said horizontal partitions having their under surfaces inclined upwardly from the ends adjacent the bunker toward. the ends away from the bunker, those portions of the warm air ducts located between the cabi net top and said horizontal partitions being pitched upwardly from the entrances to the exit ends. I

' 7. A refrigerated display case comprising an elongated body havinga display compartment extending from end to end, the floor and walls of which compartment are heat insulated, the front and back walls of said compartment being inclined to converge upwardly toward the. top, the top being flat,

the front wall including windows and the compartment and projecting into the bunker and spaced from one end of the bunker to constitute .theexit of a warm air duct, 8 horizontal partition spaced from and lying beneath the top of the display compartment and spaced therefrom to constitute the horizontal portion of said warm air duct, the entrance to which is at said one end of the display compartment, a set of inclined and spaced bafiles in alignment with said horizontal partition and extending from said cross partition toward the opposite end of said bunker, and a refrigerating apparatus in the bunker above said bafiles for the purpose described, said batlies being inclined to direct the descending chilled air toward said one end of said display compartment to displace the warmer air into the entrance of walls and top of which are heat insulated,

said body being elongated and provided with fiat top portions adjacent its ends and with a raised portion intermediate the ends to enclose a bunker, a cross partition'adjacent each end of the bunker and spaced from the end walls thereof, a horizontal partition extending from each cross partition toward the respective ends of said food compartment and spaced from the top thereof and from said respective ends, said cross partitions and said horizontal partitions constituting with the adjacent walls of the body warm air ducts, the entrances to which are located at the ends of the food compartment and the exits of which are located within the bunker, a refrigerating apparatus within the bunker between the cross partitions and above the level of the horizontal partitions, two sets of bafiles placed across the body beneath and adjacent the refrigerating appa ratus, one vset being inclined downwardly and toward one end of the body, and the other set being inclined downwardly and toward the other end of the body whereby to direct descending chilled air downwardly into the food chamber and toward either end thereof to displace the warm air into the warm air ducts and cooperate with said warm air ducts and 'said refrigerating apparatus to maintain circulation of air within the food, chamber. r

9. A refrigerated display case comprising a body having a food compartment, the floor, walls and top of which are heat" insulated, said body being elongated and provided with flat top portions adjacent its ends and with a raised portion intermediate the ends to enclose a bunker, a cross partition tdjacent'each end of the bunker and spaced from the end walls thereof, a horizontal partition extending from each cross parti tion toward the respective ends of said food compartment and spaced from the top thereof and from said respective ends, said cross partitions and said horizontal partitions cqnstituting,with the adjacent walls of the body, warm air ducts, the entrances to which are located at the ends of the food compartment and the exits of which are located within the bunker, a refrigerating apparatus within the bunker beween the cross partitions and above the level of the horizontal partitions, two sets of baffles placed across the body beneath and adjacent the refrigcrating apparatus, one set being inclined downwardly and toward one end of the body, and the other set being inclined downwardly and toward the other end of the body whereby to direct descending chilled air downwardly into the food chamber and toward either. end thereof to displace the warm air into the warm air ducts and'cooperate with said warm air ducts and said refrigerating apparatus tomaintain circulation of air within the food chamber, said cross partitions and said horizontal partitions being insulated.

' EDWARD FRIEDRICH. 

